Feature request: Excercise shuffling

Day after day I virtuously do the Exercises after going through the Expansion.  They are fine and I consider them mildly helpful.

But. The tasks are usually pretty easy to finish as you already know what vocab to expect. Especially in Ex. 2 this makes life almost too easy.

That would change drastically if you could have additional "generated" Exercises which mix together Tasks from a pool of lessons, e.g. from all Advanced level, from all Bookmarked lessons, from all Studies lessons, from all lessons with a certain tag...